{"id":"CVE-2020-27653","aliases":["EUVD-2020-20160","GHSA-8wh4-6822-h89q"],"status":"published","title":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4...","description":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.","severity":{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00832,"percentile":0.57863,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-327"],"published":"2020-10-29T08:55:21Z","modified":"2026-06-17T03:09:26Z","products":[{"vendor":"synology","product":"diskstation_manager"},{"vendor":"synology","product":"router_manager"},{"vendor":"synology","product":"synology router manager (srm)"}],"references":[{"url":"https://www.synology.com/security/advisory/Synology_SA_20_14","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1061","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27653"},{"url":"https://github.com/advisories/GHSA-8wh4-6822-h89q"}],"sources":{"cve":[{"id":"CVE-2020-27653","description":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.","status":"published","published":"2020-10-29T08:55:21.316Z","modified":"2024-09-16T19:04:23.639Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:35:53.236501Z"}],"euvd":[{"id":"EUVD-2020-20160","description":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.","status":"published","published":"2020-10-29T08:55:21Z","modified":"2024-09-16T19:04:23Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T00:55:26.73018Z"}],"ghsa":[{"id":"GHSA-8wh4-6822-h89q","title":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4...","description":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.","status":"published","published":"2022-05-24T17:32:36Z","modified":"2023-01-28T05:02:58Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:43:53.106327Z"}],"nvd":[{"id":"CVE-2020-27653","description":"Algorithm downgrade vulnerability in QuickConnect in Synology Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.","status":"published","published":"2020-10-29T09:15:13.23Z","modified":"2026-06-17T03:09:26.513Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5.1,"vector":"AV:N/AC:H/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:06:21.80969Z"}]}}